The main roadway through Zion National park remained closed Thursday after overnight rain pushed mud and debris down the surrounding hillsides.

The Zion-Mount Carmel Highway, which connects state Route 9 from Springdale across the park to state Route 89 on its east side, was closed late Wednesday after more than three inches of rain were reported in a short amount of time.

Several rock and debris slides were reported on the switchbacks below the iconic Zion-Mount Carmel Highway Tunnel.

As of Thursday morning, park staff members were still working to assess the damage, with crews working to remove the debris and clear roadway culverts, according to an email from a park spokesperson.

Also closed were the Kayenta Trail and Upper and Middle Emerald Pools trails, all of which are cliffside trails that saw extensive flood damage and rockfalls.

The park's main entrance and most trails along the main canyon remained open.

The Zion Canyon Scenic Drive was open to park shuttles and guests at the Zion Canyon Lodge, but shuttles were only scheduled to go as far as the Grotto Shuttle Stop inside the park's main canyon before turning around. Visitors are not allowed to walk the road.